A Biolistic Approach for the Transfer and Expression of a GusA. Reporter Gene in Embryogenic Cultures of Pinus Radiata

Overview

Journal Plant Cell Rep

Publisher Springer

Date 2013 Nov 7

PMID 24192868

Citations 6

Authors

C Walter

D R Smith

M B Connett

L Grace

D W White

Affiliations

Soon will be listed here.

Abstract

The biolistic® particle delivery system was used for the delivery of DNA into embryogenic tissue culture cells of Pinus radiata D. Don. Several experiments with varying parameters were performed to increase the delivery efficiency. Six different controlling elements were cloned upstream of the ß-glucuronidase coding sequence (gusA reporter gene) and transient expression of the gusA reporter gene was compared three days after bombardment. The results clearly indicate a decrease in transient expression as follows: pEmu-derivatives with the ocs-enhancer-element > 2x CaMV 35S (with Kozak consensus-sequence) > 2x CaMV 35S (without Kozak consensus sequence) > CaMV 35S (with Kozak consensus-sequence) > CaMV 35S (without Kozak consensus sequence). Time course experiments monitoring gusA expression showed a significant decrease in the number of blue spots 10-14 days after bombardment. A few blue clumps however, were still detected 35 days after shooting. Embryo initials expressing the gusA gene in all cells were also detected. The results suggest that it will be possible to develop a reliable biolistic protocol for stable integration of genes into Pinus radiata embryogenic cultures which are capable of plant regeneration.

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